Finger for graders.



W. PINES.

FINGER FOR GHADERS.

APPLICATION man Aue.5.191a.

j 1,290,339. I Patented Jan.7,1919.

I v f/vvantoz flf/lswzfwws I I M I 7 a 10%; w W

WILSON PINES, F ROGERS, MICHIGAN.

FINGER FOR GRADERS.

Specification of Letters Patent.

Patented Jan. '7, 1919.

Application filed August 5, 1918. Serial No. 248,431.

To all whom it may concern Be it known that 1, WILSON PINES, a citizenof the United States, residing at Rogers,

in the county of Presque Isle and State of Michigan, have invented newand useful Improvements in Fingers for Graders, of which the followingis a specification.

This invention relates to improvements in graders or screens for stone,ore, coal and like material, such as described in an application filedby me on January 30, 1917 Serial No. 145,469.

The present invention relates to the means for connecting the fingers tothe shafts.

Another object of the invention is to provide a device of this characterwhich is simple and durable in construction, reliable and efiicient inoperation and one which can be manufactured and placed upon the marketat a minimum cost.

The invention also consists in certain other features of constructionand in the combination and arrangement of the several parts, to behereinafter fully described, illustrated in the accompanying drawingsand specifically pointed out in the appended claims.

In describing my invention in detail, reference will be had to theaccompanying drawings wherein like characters denote like orcorresponding parts throughout the several views, and in which Figure 1is a partial view of a machine such as described in my formerapplication.

Fig. 2 is an enlarged view of one of the fingers.

Fig. 8 is a section on line 33 of Fig. 2.

Fig. 4 is a view of a modification.

As shown in these views, and as described in my former application, thedevice includes a frame made up of a plurality of spaced bars 1supported by the legs 2 and having the side pieces 8 and the hopper 4.Transverse shafts 5 pass through the spaced bars 1 and fingers 6 arecarried by said shafts and are located in the spaces between said bars.

When the material to be graded is dumped on the hopper 4 and moveddownwardly on to the spaced bars it will be acted on by the revolvingfingers so that the material will be agitated by said fingers and thosepieces which do not pass through the spaces between the bars will beadvanced bysaid fingers to the other end of the machine.

The shafts 5 and the fingers are revolved by means of a chain 7 engagingwith the toothed wheels 8 connected with the shafts and suitably drivenby any desired means.

As before stated this invention relates to the means of mounting thefingers on the shafts and in carrying out my invention I make saidshafts of square formation in cross section and provide each finger witha square recess 9 to receive said shaft. In the form of invention shownin Figs. 2 and 3 the recess 9 is extended as at 9 through the base ofthe finger and a block 10 fits in the extended part of the recess tohold the shaft in place. This block is held in place by the screws 11which pass through the edges of the block and the walls of the extendedpart of the recess as shown.

In the modification shown in Fig. 4 the base of the finger is cut off ona line with the bottom of the recess and a cap 13 is removably securedto this cut oif portion by the screws 14. p a

It will thus be seen that the fingers may be quickly and easily removedand attached to the shafts without necessitating the withdrawal of theshafts from the machine.

It is thought from the foregoing description that the advantages andnovel features of my invention will be readily apparent.

I desire it to be understood that I may make such changes in theconstruction and in the combination and arrangement of the severalparts, provided that such changes fall within the scope of the appendedclaims.

What I claim is 1. A finger for grading machines comprising an enlargedbase having a square recess therein, said recess extending inwardly,from the rear edge of the base and a removable cap closing one end ofsaid recess and forming a continuation of the said edge.

2. A. finger for grading machines comprising an enlarged base having asquare recess therein, said recess extending inwardly from the rear edgeof the base, a block fitting in the end of said recess and closing thesame and forming a continuation from said edge and screws engagingtheedges of the block and, the walls of the recess for holding the block inposition.

In testimony whereof I afiix my signature.

WILSON PINES.

copies of this patent may be obtained for five cents each, by addressingthe fflommissioner o! IItentl.

Washington, D. 0."

